July is one of the warmer months of the year in Truro, with average highs near 23.8°C and lows around 14°C (mean 18.9°C). It is about average for rainfall, averaging 76 mm of rainfall and 81% relative humidity across the period.
July is one of the warmer months of the year in Truro. Across 45 years of records, the warmest July in Truro was 2023 — when the month averaged 22°C — while the coldest was 1992 at 16.2°C. Typical July days reach 23.8°C with nights near 14°C. The long-term trend is warming, about 0.4°C per decade.
July is about average for rainfall in Truro, averaging 76 mm of rainfall. The wettest July on record was 2024 with 152 mm, while the driest was 1987 at 25 mm.
Relative humidity in Truro during July averages 81%. The most humid July was 2015 at 86%, and the least humid was 1987 at 69%.
July receives about 5.5 kWh/m²/day of solar energy in Truro. The sunniest July was 1997 at 6.4 kWh/m²/day, and the cloudiest were 1988 and 2004 at 4.7.
Average wind speed in Truro during July is 0.4 m/s. The windiest Julys were 2021, 2022 and 2025, among others at 0.5 m/s, while the calmest was 1988 at 0.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 18.6°C | 18.8°C | 18.3°C | 19.1°C | 20.3°C | +1.7°C |
| Avg High | 23.6°C | 23.9°C | 23.0°C | 23.9°C | 25.3°C | +1.7°C |
| Avg Low | 13.6°C | 13.6°C | 13.6°C | 14.4°C | 15.2°C | +1.6°C |
| Avg Rain | 76 mm | 68 mm | 76 mm | 73 mm | 99 mm | +24 mm |
July temperatures in Truro have risen by about 1.8°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 6.8°C (1992) to a record high of 32.9°C (1999).
Rainfall in July is about average for rainfall, averaging 76 mm, with a wettest year of 152 mm.
One of the best times to visit Truro
July is one of the best times to visit Truro. Expect days averaging 23.8°C and nights around 14°C (mean 18.9°C) — warmer than Truro's yearly average — with moderate rainfall (76 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 26.8°C | 20.8°C | 14.9°C | 32.5°C | 11.7°C | 47 mm | 74% | 0.5 m/s | 5.8 |
| 2024 🌧️ | 25.0°C | 20.4°C | 15.8°C | 28.2°C | 11.1°C | 152 mm | 86% | 0.4 m/s | 5.6 |
| 2023 🔥 | 26.6°C | 22.0°C | 17.3°C | 30.2°C | 13.4°C | 108 mm | 83% | 0.4 m/s | 5.3 |
| 2022 | 24.7°C | 19.6°C | 14.5°C | 31.0°C | 10.2°C | 77 mm | 79% | 0.5 m/s | 6.2 |
| 2021 | 23.5°C | 18.6°C | 13.8°C | 29.7°C | 10.0°C | 81 mm | 79% | 0.5 m/s | 4.8 |
| 2020 | 25.2°C | 20.2°C | 15.1°C | 31.1°C | 9.3°C | 130 mm | 81% | 0.4 m/s | 5.4 |
| 2019 | 23.4°C | 18.7°C | 14.0°C | 29.5°C | 9.4°C | 46 mm | 83% | 0.5 m/s | 6.1 |
| 2018 | 26.1°C | 20.9°C | 15.6°C | 29.6°C | 11.1°C | 53 mm | 80% | 0.4 m/s | 6.1 |
| 2017 | 22.9°C | 18.2°C | 13.6°C | 27.2°C | 8.9°C | 61 mm | 82% | 0.5 m/s | 5.7 |
| 2016 | 23.4°C | 18.7°C | 13.9°C | 30.0°C | 8.4°C | 82 mm | 83% | 0.4 m/s | 5.6 |
| 2015 | 22.3°C | 17.8°C | 13.4°C | 25.3°C | 9.8°C | 98 mm | 86% | 0.4 m/s | 5.2 |
| 2014 | 24.5°C | 19.8°C | 15.1°C | 27.9°C | 11.1°C | 54 mm | 84% | 0.5 m/s | 5.6 |
| 2013 | 24.5°C | 19.9°C | 15.3°C | 30.0°C | 10.5°C | 86 mm | 83% | 0.5 m/s | 5.3 |
| 2012 | 24.9°C | 19.5°C | 14.0°C | 29.5°C | 10.9°C | 46 mm | 77% | 0.4 m/s | 5.9 |
| 2011 | 22.7°C | 18.2°C | 13.6°C | 28.1°C | 10.2°C | 94 mm | 85% | 0.5 m/s | 4.9 |
| 2010 | 23.9°C | 19.5°C | 15.1°C | 27.6°C | 9.6°C | 107 mm | 85% | 0.5 m/s | 5.6 |
| 2009 | 22.2°C | 17.7°C | 13.2°C | 27.6°C | 7.3°C | 94 mm | 85% | 0.4 m/s | 4.8 |
| 2008 | 24.7°C | 20.0°C | 15.2°C | 28.8°C | 10.3°C | 61 mm | 85% | 0.4 m/s | 5.4 |
| 2007 | 23.0°C | 18.5°C | 14.0°C | 28.3°C | 7.2°C | 98 mm | 86% | 0.4 m/s | 5.1 |
| 2006 | 23.6°C | 19.1°C | 14.5°C | 27.2°C | 11.4°C | 114 mm | 86% | 0.4 m/s | 5.4 |
| 2005 | 22.7°C | 17.9°C | 13.1°C | 28.5°C | 9.5°C | 61 mm | 84% | 0.4 m/s | 5.1 |
| 2004 | 23.0°C | 18.3°C | 13.6°C | 28.1°C | 8.9°C | 52 mm | 84% | 0.4 m/s | 4.7 |
| 2003 | 23.7°C | 19.3°C | 14.9°C | 27.4°C | 11.4°C | 60 mm | 84% | 0.4 m/s | 5.5 |
| 2002 | 22.9°C | 17.8°C | 12.8°C | 29.8°C | 8.1°C | 62 mm | 82% | 0.4 m/s | 5.7 |
| 2001 | 22.0°C | 17.2°C | 12.4°C | 28.5°C | 9.0°C | 59 mm | 83% | 0.5 m/s | 5.9 |
| 2000 | 21.8°C | 17.2°C | 12.6°C | 25.7°C | 9.6°C | 95 mm | 84% | 0.5 m/s | 5.6 |
| 1999 | 26.1°C | 20.5°C | 14.9°C | 32.9°C | 10.1°C | 56 mm | 73% | 0.4 m/s | 5.8 |
| 1998 | 24.1°C | 19.1°C | 14.0°C | 30.2°C | 9.8°C | 63 mm | 80% | 0.4 m/s | 5.7 |
| 1997 | 24.5°C | 18.8°C | 13.2°C | 31.2°C | 8.4°C | 26 mm | 75% | 0.4 m/s | 6.4 |
| 1996 | 22.0°C | 17.5°C | 13.0°C | 26.0°C | 10.4°C | 140 mm | 84% | 0.5 m/s | 5 |
| 1995 | 24.3°C | 19.4°C | 14.4°C | 28.1°C | 9.3°C | 99 mm | 81% | 0.4 m/s | 5.1 |
| 1994 | 26.1°C | 20.9°C | 15.7°C | 31.4°C | 9.6°C | 40 mm | 77% | 0.4 m/s | 5.6 |
| 1993 | 21.8°C | 17.0°C | 12.2°C | 27.9°C | 8.4°C | 84 mm | 80% | 0.4 m/s | 5.2 |
| 1992 ❄️ | 21.1°C | 16.2°C | 11.3°C | 26.3°C | 6.8°C | 62 mm | 80% | 0.4 m/s | 6.1 |
| 1991 | 24.8°C | 19.1°C | 13.5°C | 31.6°C | 8.5°C | 53 mm | 73% | 0.4 m/s | 5.9 |
| 1990 | 24.2°C | 19.2°C | 14.2°C | 31.2°C | 8.6°C | 57 mm | 78% | 0.4 m/s | 5.6 |
| 1989 | 23.7°C | 18.2°C | 12.7°C | 31.0°C | 8.6°C | 52 mm | 75% | 0.5 m/s | 5.8 |
| 1988 | 24.5°C | 19.4°C | 14.4°C | 29.6°C | 8.9°C | 123 mm | 83% | 0.3 m/s | 4.7 |
| 1987 | 26.0°C | 20.2°C | 14.3°C | 32.2°C | 9.2°C | 25 mm | 69% | 0.4 m/s | 5.6 |
| 1986 | 22.0°C | 16.9°C | 11.9°C | 29.7°C | 8.3°C | 104 mm | 79% | 0.4 m/s | 4.8 |
| 1985 | 23.2°C | 18.5°C | 13.8°C | 27.0°C | 9.9°C | 39 mm | 84% | 0.4 m/s | 5.9 |
| 1984 | 24.0°C | 19.4°C | 14.8°C | 27.0°C | 11.0°C | 54 mm | 83% | 0.4 m/s | 5.7 |
| 1983 | 22.3°C | 18.0°C | 13.6°C | 27.4°C | 8.1°C | 104 mm | 84% | 0.5 m/s | — |
| 1982 | 23.6°C | 18.6°C | 13.5°C | 28.9°C | 8.5°C | 82 mm | 82% | 0.4 m/s | — |
| 1981 | 22.7°C | 18.1°C | 13.5°C | 26.3°C | 10.6°C | 98 mm | 82% | 0.4 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 23.8°C with lows near 14°C (mean 18.9°C), based on 45 years of NASA POWER data.
July averages 76 mm of rainfall in Truro, about average for rainfall. The wettest on record was 152 mm in 2024.
The hottest July reached 32.9°C in 1999. The coldest dipped to 6.8°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.8°C. Daytime highs moved from 23.2°C to 25.3°C and overnight lows from 13.8°C to 15.3°C over the same span.
July is one of the warmer months of the year in Truro and about average for rainfall, so plan for around 23.8°C daytime highs and 14°C at night.
Not quite — July is the 11th coolest month in Truro, averaging 18.9°C.
For July in Truro, pack light layers you can adjust through the day, with typical highs of 23.8°C and lows of 14°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 81% — quite humid.
Average wind speed in July is 0.4 m/s. The windiest July on record averaged 0.5 m/s (1983).
The wettest July on record was 2024 with 152 mm. On average, July sees 76 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Truro behaves each July, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for July specifically, along with year-by-year records and how the month has changed over the decades.
